– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Tue 17 Mar Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Tue 17 Mar Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Tue 17 Mar Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryHeavy rain (total 142mm), heaviest during Fri morning. Very mild (max 10°C on Wed afternoon, min 8°C on Wed night). Wind will be generally light. | Days 5–7 Weather SummaryModerate rain (total 17mm) heaviest on Fri night, then becoming colder with a dusting of snow on Sun morning. Freeze-thaw conditions (max 10°C on Fri afternoon, min -1°C on Sat night). Wind will be generally light. | ||||||||||||||||
Tue 17 | Wednesday 18 | Thursday 19 | Friday 20 | Saturday 21 | Sunday 22 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | | | | | |  |  |  |  |  | | | |
light rain | heavy rain | heavy rain | mod. rain | heavy rain | heavy rain | heavy rain | heavy rain | heavy rain | mod. rain | mod. rain | some clouds | rain shwrs | some clouds | light snow | light rain | some clouds | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | |
3 | 26 | 10 | 6 | 24 | 12 | 15 | 26 | 19 | 6 | 8 | — | 1.1 | — | — | 1.9 | — | |
max °C | 9 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 9 | 10 | 6 | 1 | 2 | 0 | 2 | 2 | 1 |
min °C | 9 | 9 | 9 | 9 | 8 | 9 | 9 | 9 | 9 | 9 | 0 | 0 | 2 | -1 | 0 | 2 | -1 |
8 | 7 | 9 | 7 | 6 | 7 | 7 | 8 | 8 | 7 | -2 | -2 | -1 | -1 | -3 | 0 | -1 | |
2500 | 2400 | 2450 | 2600 | 2550 | 2400 | 2250 | 2350 | 2150 | 1950 | 750 | 600 | 800 | 350 | 750 | 800 | 250 | |
Cloud base (m) | 550 | 550 | 600 | 550 | 600 | 600 | 600 | 550 | 550 | 550 | 600 | 650 | 650 | 1950 | 650 | 600 | 600 |
 | — | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — |
 | 7:15 | — | — | 7:16 | — | — | 7:17 | — | — | 7:20 | — | — | 7:21 | — | — | 7:22 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Heavy rain (total 142mm), heaviest during Fri morning. Very mild (max 10°C on Wed afternoon, min 8°C on Wed night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Moderate rain (total 17mm) heaviest on Fri night, then becoming colder with a dusting of snow on Sun morning. Freeze-thaw conditions (max 10°C on Fri afternoon, min -1°C on Sat night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
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* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.